Update license headers to 2026 (#1855)

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

Author: holgerfriedrich

distributions/openhab/merge-addon-info.groovy

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2025 Contributors to the openHAB project
+ * Copyright (c) 2010-2026 Contributors to the openHAB project
  *
  * See the NOTICE file(s) distributed with this work for additional
  * information.

pom.xml

@@ -142,7 +142,7 @@
             </mapping>
             <useDefaultExcludes>true</useDefaultExcludes>
             <properties>
-              <year>2025</year>
+              <year>2026</year>
             </properties>
             <encoding>UTF-8</encoding>
             <licenseSets>